Helena Valley Northwest's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Helena Valley Northwest a growing zone designation of 4b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Helena Valley Northwest's climate. If you are looking for plants suitable for growing in the Helena Valley Northwest area, head on over to our page on plants that grow well in Helena Valley Northwest, MT.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Stainless Steel Garden Tool Set

Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Understanding your growing zone is very important because it is a measure of the lowest temperature that a plant can survive, helping you to decide what plants would grow best in your particular climate. Since Helena Valley Northwest is in growing zone 4b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Helena Valley Northwest's climate should be chosen with this in mind or plants should be moved inside to keep their core temperature in the right range if necessary.

USDA Growing Zone: 4b

Zip Codes: 59602

Longitude: -112.0631

Latitude: 46.7289

Lowest Avg Temperatures (F): -25 to -20